Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1993-10-08
1995-04-18
Epps, Georgia Y.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 47, 369 33, G11B 7085
Patent
active
054084482
ABSTRACT:
Varying the selection and play of tracks on a CD in non-sequential order includes a CD mechanism (12) with which a processor (16) communicates, a keyboard (17) having a shuffle play key (18) for user actuation, and a disc and track display (19). The processor (16) generates a shuffled selection offset (T.sub.n) from a deterministic function based upon a sequence number (S.sub.n) and a random seed (Seed). The deterministic function includes performance of plurality of binary operations which may include bit inversions, exclusive OR with an N-bit constant, N-bit rotations, bit swapping, one to one substitutions, and modulus additions and subtractions. The generated sequence plays all selections before any selection is repeated, allows the user to replay any past selection or skip to any unplayed selection while maintaining the same order, requires minimal memory and execution time, and is suitable for use with single-disc CD players and multi-disc CD changers.
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Delco Electronics Corporation
Dinh Tan
Epps Georgia Y.
Funke Jimmy L.
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